1271562779120 has 40 divisors (see below), whose sum is σ = 3028490382960. Its totient is φ = 496219619840.

The previous prime is 1271562779101. The next prime is 1271562779131. The reversal of 1271562779120 is 219772651721.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193832510 + ... + 193839069.

It is an arithmetic number, because the mean of its divisors is an integer number (75712259574).

Almost surely, 2^{1271562779120} is an apocalyptic number.

1271562779120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1271562779120 is an abundant number, since it is smaller than the sum of its proper divisors (1756927603840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1271562779120 is a wasteful number, since it uses less digits than its factorization.

1271562779120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387671633 (or 387671627 counting only the distinct ones).

The product of its (nonzero) digits is 740880, while the sum is 50.

The spelling of 1271562779120 in words is "one trillion, two hundred seventy-one billion, five hundred sixty-two million, seven hundred seventy-nine thousand, one hundred twenty".